Goulds Pumps 3700 - IOM - Manual (Page 73)

Maintenance
• Impeller lockwasher (199A)
• Impeller nut (304)
• Bearing lockwasher (382)
• Impeller spacer (443A)
• Water jacket cover (490)*
• All nuts, bolts, and screws
* If supplied.
Shaft replacement guidelines
Shaft measurement check
Check the bearing fits of the shaft. If any are outside the tolerances shown in the Bearing fits
and tolerances table, then replace the shaft.
Shaft straightness check
Check the shaft straightness. Use "V" blocks or balance rollers to support the shaft on the
bearing fit areas. Replace the shaft if runout exceeds 0.001 in. (0.03 mm).
NOTICE:Do not use shaft centers for the runout check as they may have been damaged during
the removal of the bearings or impeller.
Shaft surface check
Check the shaft surface for damage, especially in areas indicated by the arrows in the following
figure. Replace the shaft if it is damaged beyond reasonable repair.
Bearings inspection
Condition of bearings
Do not reuse bearings. The condition of the bearings provides useful information on operating
conditions in the bearing frame.
Checklist
Perform these checks when you inspect the bearings:
• Inspect the bearings for contamination and damage.
• Note any lubricant condition and residue.
• Inspect the ball bearings to see if they are loose, rough, or noisy when you rotate them.
• Investigate any bearing damage to determine the cause. If the cause is not normal wear,
correct the issue before you return the pump to service.
Replacement bearings
Table 6: 3700 bearings based on SKF / MRC designations
Replacement bearings must be the same as, or equivalent to, those listed in this table.
Group Radial (inboard) Thrust (outboard)
SA 6210 C3 7310 BEGAM
MA 6211 C3 7311 BEGAM
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance 71
Manual